The Mechanism,Thermodynamic and Kinetic Characteristics of the Microbial Reduction of Goethite Mediated by Anthraquinone-2-Sulfonate |
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| Authors: | Weihuang Zhu Yangang Nan Tinglin Huang Fengchang Wu |
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| Institution: | 1. Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi’an University of Architecture and Technology , Xi’an , China;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences , Beijing , China |
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| Abstract: | The microbial reduction process of goethite by Shewanella decolorationis S12 was evaluated. The results showed the electron shuttle, anthraquinone-2-sulfonate (AQS), could enhance the microbial reduction. The thermodynamic and kinetic characteristics of goethite reduction by microorganisms were influenced by AQS, concentrations of iron oxide, and electron donor. Transformation between oxidized and reduced species of the electron shuttle during the microbial reduction could be newly noticed. Two interactive steps, biotic and abiotic, were involved in the microbial reduction of Fe (III) oxide mediated by electron shuttle. |
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| Keywords: | electron shuttle Gibbs free energy goethite reduction kinetic characteristics Shewanella decolorationis S12 |
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